Method of retaining a noise attenuation device in a compressor cover

Abstract

A compressor housing ( 12 ) and a method of retaining for use with a turbocharger having a noise attenuation device ( 20 ) secured in a compressor cover ( 14 ). A staking tool ( 40 ) deforms compressor cover material to retain the noise attenuation device ( 20 ). The compressor housing ( 12 ) includes the noise attenuation device ( 20 ) seated on a first shoulder ( 24 ) in the cover ( 14 ), and a second shoulder ( 26 ) is deformed securing the noise attenuation device ( 20 ) in the cover ( 14 ). Retaining a noise attenuation device ( 20 ) in the cover ( 14 ) may include mounting the cover ( 14 ) with the air inlet section ( 16 ) upward; placing the noise attenuation device ( 20 ) in the air inlet section ( 16 ) on the first shoulder ( 24 ); and applying an impact load with a staking tool ( 40 ) to deform compressor cover material around the noise attenuation device ( 20 ) to secure it in the cover ( 14 ).

What is claimed is: 
     
         1 . A compressor housing ( 12 ) adapted for use with a turbocharger having a noise attenuation device ( 20 ), the compressor housing ( 12 ) comprising a first shoulder ( 24 ) in an air inlet section ( 16 ) of a compressor cover ( 14 ) with the noise attenuation device ( 20 ) seated on the first shoulder ( 24 ), and a second shoulder ( 26 ) in the compressor cover ( 14 ) of a larger diameter that is deformed securing the noise attenuation device ( 20 ) in the compressor cover ( 14 ). 
     
     
         2 . The compressor housing ( 12 ) of  claim 1  wherein the noise attenuation device ( 20 ) has a mounting face ( 30 ) that is seated on the first shoulder ( 24 ). 
     
     
         3 . The compressor housing ( 12 ) of  claim 2  wherein the noise attenuation device ( 20 ) is pressed steel. 
     
     
         4 . The compressor housing ( 12 ) of  claim 2 , wherein the second shoulder ( 26 ) includes localized deformations that engage the mounting face ( 30 ). 
     
     
         5 . A method of retaining a noise attenuation device ( 20 ) in a compressor cover ( 14 ) having a first shoulder ( 24 ) and second shoulder ( 26 ) at an air inlet section ( 16 ), adapted for use with a turbocharger, comprising the steps of
 mounting the compressor cover ( 14 ) with the air inlet section ( 16 );   placing the noise attenuation device ( 20 ) against the first shoulder ( 24 );   applying a specific impact load on the second shoulder ( 26 ) with a staking tool ( 40 ); and   deforming compressor cover material of the second shoulder ( 26 ) around the noise attenuation device ( 20 ) with impact of the staking tool ( 40 ) to secure the noise attenuation device ( 20 ) in place in the compressor cover ( 14 ).   
     
     
         6 . The method of  claim 5  wherein the staking tool ( 40 ) is vertically mounted. 
     
     
         7 . The method of  claim 5  wherein the step of placing the noise attenuation device ( 20 ) on the first shoulder ( 24 ) includes placing a mounting face ( 30 ) of the noise attenuation device ( 20 ) on the first shoulder ( 24 ). 
     
     
         8 . The method of  claim 5 , wherein the staking tool ( 40 ) includes protruding indenters configured to provide regions of localized deformation upon impact. 
     
     
         9 . A method of retaining a noise attenuation device ( 20 ) in a compressor cover ( 14 ) having a first shoulder ( 24 ) and second shoulder ( 26 ) at an air inlet section ( 16 ) comprising the steps of
 mounting the compressor cover ( 14 ) with the air inlet section  16  facing upwardly;   dropping the noise attenuation device ( 20 ) in the air inlet section ( 16 ) to rest on the first shoulder ( 24 );   applying an impact load on the second shoulder ( 26 ) with a vertically mounted staking tool ( 40 ); and   deforming compressor cover material of the second shoulder ( 26 ) around the noise attenuation device ( 20 ) with impact of indenters ( 42 ) of the staking tool ( 40 ) to secure the noise attenuation device ( 20 ) in place in the compressor cover ( 14 ).